I'm sure this has been touched on many times, but it's hard to find clear-cut scientific responses without a bunch of bull&$*# speculation. To simplify the question, let's leave test out of it. Tren and Mast are both known to reduce fat, water, estrogen, etc., so what is the difference if one person uses a long, enanthate ester, and another uses a shorter prop/acetate ester? If the compounds are both dry and used at the same time, why would enanthate, prop, acetate, etc even matter?